Berniiart schiff and louis mayer



(No Model.)

B. SCHIFF & L. MAYER. WATCH CASE PENDANT.

No. 447,908. Patented Mar. 10,1891

UNITED STATES PATENT OFFICE.

BERNHART SCHIFF AND LOUIS MAYER, OF NEV YORK, N. Y

WATCH-CASE PENDANT.

SPECIFICATION forming part of Letters Patent No. 447,908, dated March 10, 1891. Application filed August 28, 1890- Serial No. 363.324. (No model.)

specification.

Our invention relates to an improvement in watch-pendan ts in which a loose band carrying the bow for the attachment of the chain is held in position upon the stem by the crown of the winding-spindle.

The object is to provide for securing the bow in a simple and effective manner, so that it cannot be twisted from its sockets and so that it will not be liable to work loose, and at the same time to secure the windingspindie in position in the stem, so that it will not be subject to accidental displacement, distortion, or breakage.

A practicalembodiment of our invention is represented in the accompanying drawings, in which Figure 1 is a view of the watch-ease and pendant in side elevation, showing the parts in assembled adjustment. Fig. 2 is aview of the upper portion of the case, the stem, the bow, and the winding-spindle, showing the parts partially in section and upon an enlarged scale. Fig. is a transverse section through the stem, the winding-spindle, and the ends of the how, the bow being represented here as turned over in a position substantially at right angles to the stem. 4 Fig. etis a modified form showing the winding-spindle and its head permanently fixed to one another. Fig. 5 is a view in detail showing the ends of the bow as it appears before it is upset; and Fig. 0 is a detail view showing, upon an enlarged scale,the seat-washerin its position relatively to the upset end of the bow.

A represents the watch-case, and a its stein. In the present instance the stem is shown as permanently fixed to the case and provided with a reduced upwardly-extending cylindrical portion a to receive theannular band, to which the ends of the watch-bow are secured. The stem a is provided with a central perforation a which extends from its upper end centrally through it and communicates with the interior of the watch-case, as is usual. The perforation a forms a seat for the winding-spindle B. The windingspimlle B is here shown as secured within the perforation (Him the stem against longitudinal displacement, and at the same time in such a manner that it may be freely rotated by means of an annular groove 1), which receives the end of a screw 1), seated in a threaded perforation at the side of the stem, with its inner end project ing within said groove Z) and with its head or outer end flush with the outer face of the reduced portion of the stem.

In the form shown in Fig. 2 the windingspindle B is provided with a screw-thread b atits upper end and the thumb-piece or crown C, by which the spindle is turned, is provided with a screw-threaded perforation 0, adapted to register with the screw-threaded end of the spindle, by means of which the crown is removably secured to the spindle for the purpose of operating it. In the form shown in Fig. 4 the thumb-piece or crown U is formed integral with or permanently fixed to the spindle B.

In order to provide against any lateral strain which might be exerted upon the crown C and thereby tend to bend or break the winding-spindle, the upper end of the reduced portion a of the stem is provided with an enlarged socket b", adapted to receive the depending boss 0, formed around the threaded portion 0 in the crown O by means of an annular recess 0 extending for some distance within the crown. When the portion of the stem surrounding the enlarged socket-piece b is received within the end of the recess 0 of the crown,the crown is prevented from lateral displacement and at the same time is free to turn together with the spindle 13.

An annular band D is formed of such size as to embrace with a close sliding fit the reduced portion of the stem, and when slid thereon is held in its position by means of the enlarged crown O on the spindle B. The band I) is provided at diametrically-opposite points with perforations cl for the reception of the reduced ends (2 of the watch-ring E. The inner ends of the perforations (Z are enlarged, as shown at d, for the reception of seat-rings F and for the turned-over edges f of the ends of the watch-bow.

In order to facilitate the upsetting of the end of the watclrbow, we provide such ends with sockets 6'. Because of the tendency of the upset end of the watch-bow to produce a ragged edge, which would in a short time tend to cut out its seat and loosen the bow, we provide the annular seat-washer F,which before the end of the bow is upset is placed within the enlarged portion d of the-perforations in the band, and the end of the watchbow is upset against its inner face. The tendency will be for the metal of the upset end to bite into the face of the seat-washer F and causeit to rotate with the watch-bow, While the inner face of the seat-washerbears evenly and smoothly against the base of theenlarged portion (1', thereby preventing undue wear and loosening of the bow.

In order to gain access to the screw 1), which secures the winding-spindle to the stem, a perforation d is formed through the band D the size of the head of the screw, or it may be larger.

In order to give the Watch-bow a tendency to occupy a position with its ends in a plane with the watch-case, the diametrically-opposite sides of the reduced portion a of the stem may be slightly recessed,as shown at 06, for the reception of the slightly inwardlybulged portions f of the upset ends of the bow. Such depressions will tend to hold the and the bow carried thereby being turned around the stem in case of an attempt to twist the bow from its position.

The above-described structure admits of a ready application of the same to watches in common use without any fitting by simply keeping in stock the different sizes of bands D corresponding to the numbered sizes of stems.

What we claim as our invention, and desire to secure by Letters Patent, is

The combination, with the watch-case stem and the band secured thereon in rotary adjustm ent and provided with diametrically-opposite perforations having enlarged inner portions, of a watch-bow having its ends projecting within said perforations in the band and having its inner ends upset, and a seatwasher located within the enlarged portions of said perforations in the band between theupset ends of the band and the bases of such enlarged portions, substantially as set forth.

Witnesses:

FREDK. HAYNES,

GEORGE BARRY. 

